Mechanism for reversing motive devices for operating doors and the like



Sept. 1-3, 1932. R. D. CONKLIN 1,877,161 MECHANISM FOR REVERSING M OTIVEDEVICES FOR OPERATING DOORS AND THE LIKE 2- Sheets-Sheet 1 OriginalFiled June 7, 1929 3140044 601. Rosana Q ConK/in.

VQ------------S I agn /zl's filbtowqga p 1932- R. 0. CONKLIN 1,877,161

MECHANISM FOR REVERSING MOTIVE DEVICES FOR OPERATING DOORS AND THE LIKEOriginal Filed June '7. 1929 2 Sheets-Sheet 2 gum/mica Roscoe 0 ConKl/n3513/ 5 Gwyn W136 Patented Sept. 1 3, 1932 owner.

oo'ivirAnY, 01' NEW YORK, N. Y., A ooRro'FLA'TIoN or virrisr mar in;

ma nesia 1 6i; R vERsING MOTIVE DEVICES F0155 oPERZi'TiNG nooit's tiniiL'I'iifi original ep pliceition filed June 1828, Serial n $9,205, nowretentive; 1,828,860, i tea octo'bei 2'7,'1'931".

Divided and this application filed May 24, 1980. semi No. 455,264.

v p -I.-.; q 1 This lnvention relates in, general E appe;

retus for use in conjunction withlniotive .oie-

vices for operating doors, gates and the like ;;by means o fwhich themotive devices and the doors are reversed in direction of movement whenthey strike an object in their path;

One of the objects of thisinventi'on is the provision of relativelysiihpie mechanism of the above nature for use in connection with 1dmovable doors and their 0 eratin mechanisni'which is simple and ruggedin construction and adeptedt'o easy andrap d Inenufacture and, easyrepair and repl'z cen'ientj v A further eljject of this invention isthe" provision of reversing mechan sm for RS611;

connection all typejs' o'f door operating motors, such as the pneumaticand electrical types.

connecting niechtlnisin het ween the motive device a'nd' the doorWl1lCi1 lS arranged to he closed upon' the door striking an obstructionMtoefl'ect' a reversal in movement of 23 ating mechanism.

the oper- The se" andotherobjects sswiuappeer from the followingdisclosiire are successfnliy at 8% June 7, 1929.

Referringto the drawings which have'lieen given n an illustrative sense-1 Figure 1 isa side elevatlonal. View of one form of device for ticc'oinlishiiw the urposes of this invention;

Fig. 2 is a cross-sectional view taken onthe linej2'2 o fF g.1;- V VFig. 3 is a side elevational view of modified form of device foraccomplishing the same results;

get is an elevation'al view of another form of the device as applied tothe connec ing'link to be employed between the motive device and thedoor; V

" the .door. to effects revei sgz l hoven ei ix A' further objectlolf heinvention is the provision ofa switch cooperating With the g Thisinvention resides stllostanti'zilly in thec. f l 7 combination,construction, arrangement and Fig. 5 is another view of the mechanism ofa a -'1.1 :J L); tin: a: ;l. 1 i e. 4 wit m y pei'tsibr kse mm. sh w nsr w hwest i ie en le per eithe mechanisn for operetin it, which; part isem Q h i e Q QQi FQ-AK MW & i i e rem eti esse iati he, elements QmP iiPgihie in emi nw-i r The Inost tenernllx lrn'ovvn g nd ised ofreversing inechanisini fonpovver o iereted e si s e iip lie ,l e-m leywe i I, or collapsible shoev onsthe. forwa rd edge ojj the moving doorwhich is deformedor co l; lapsed When the Q oor strikes .a n hiec t ttSto close a; switch or ,control hng @e nected to the Iiiotivede vice fort thereof. The present inye'ntioli hes ft'odo vyit several forms or.devices hy nieeiis" of simil'ar res1ilts are Secured withoiit necessityof employing afi'exihle' or collapsible fhqiey onthe forward" edge ofthe bog; ,To' understand the structure o invention reference Will be mede' tog ,Beferring toFig; 11', the for in ofdeviced sclosedtherein.coniiprises a; notor shown generally atl', oftlieldi'iferenti-altypg Aftthis perm itjmightjbe m h s 'zed twee s" principles, of thisiriventigliflare 'ri ot, re strigterlf to the form ofniotive device,whether-lit be; pneuinatic or electrigfaiiid thedisclosure the drawingsis only'given to-lill iistrete the prinoiples'of the inv ntipiii The pnumatic motor 1 is. shown ,cfomprising e, large; and a} 'sniiell cylinder2 end 3,,aiid. the pistehv rodit'f extending beyond the end"ojche,;s'mt11 r'p 1 inden The pneumatic motor 1 on a base plate 5 whichin 'turnz'issnpported by. a. supporting plate 6 extending throughportion of the lllgth thereof on eg ch side, the flanges 7 comprisingmarten pa 'horizontal portionQ These flanges enclose the fee; I

edges of the ,besepleitei5iinemanner so the base plate ,niotor supportedthereon may. slide longitiidinztlly of thei plate ,6 guided by theflengesil Supported. on

- one end of theibaselplaiteieis a" bracketBgto i which is secured thevertical arrnfl andgthe horizontal pin 10. The tr ee end of the lpinl'10 extends through the bracket 12,:secnred to I thesupporting plate e".Theipin 10 is 811?;

circled by means of a, heavy spring 11 which Ice lies between thebracket 12 and the arm 9. Secured. to the upper end of arm 9 is a pin1.3 having a reduced portion 14 on which is slidably mounted a contactdisc 17 supported between the insulating members 16 and by means ofwhich the disc is insulated from the portion 14. A spring 15 is mountedbetween the insulatingmembers 16 and the contact disc 17 which arearranged to slidably move as a unit on the reduced portion 14 againstthe action of the spring 15 and the shoulder on the pin 13. Supported ona bracket 19 is a block of insulating material 18 which in turn supportsthe fixed contacts 20 which are arranged to be bridged by the contactdisc 17 The piston rod 4 is, of course, intended to be connected by anysuitable connecting link to the doors and the like to be operated by themotive device. The supporting plate 6' is provided with a'stop pin 22against which the base plate 5 is forced by means of the heavy spring 11reacting on the fixed bracket 12. The pipe 21 is provided for supplyingfluid pressure to the larger cylinder 2 of the motor 1. The operation ofthe device will be described later in connection the motive device.gages the connecting member 25 and s held with Fig. 6.

The modified form of device shown in Fig. 3 comprises, as before, thepneumatic motor 1 having the piston rod 4. Pivotally' secured .to thepiston rod 4 by the arms 26 of the connecting member 25 is a short shaft27 which threadedly engages the connecting member 25 and is held inadjusted position by means of the lock nut 28. Two lock nuts 29 are alsomounted on the shaft 27 against which presses the hollow sleeve 30. Theend of the shaft 27 is provided with an enlarged portion 31 which actsas a stop for the plate 33 which encircles the shaft27 and is forcedagainst the portion 31 by means of the spring 32. Theshaft 27 isprovided with a reduced cylindrical portion on which is slidably mountedand from which is insulated the contact disc 17. A spring 41 resilientlyresists movement of the contact disc 17. A framework 34 is secured tothe plate 33 and has supported thereon and insulated therefrom thecontacts 20 adapted to be bridged by the contact disc 17. A shaft 35threadedly engages the framework 34 and is held in adjusted position bymeans of the lock nut .36. The shaft 35 is adapted to be secured to thedoors which are to be operated. The operation of this device will bedescribed in connection with Fig. 6;

Another form of the device is shown in Figs; 4 and 5. Thereversingswitch in this case, as in the case of the form shown in Fig. 3,comprises a portion of the connecting link to be inserted between themotive device and 1 the door. As before, the connecting member 25 isprovided with the arms 26 which are to be pivotally connected to thepiston rod of A shaft threadedly en gated slot 49. Secured to the shaftis 4 another block 53 which is held in place by means of the lock nut-54. A heavy spring lies between the blocks 48 and 53. The other end ofshaft 50'is provided with the connecting member 55 which is held inplace by means of the lock nut 56 and is adapted to connect themechanism to the door to be operated. Pivotally supported on the block53 is an arm 57 which is provided at its outer end with a pair ofrollers 59 and a downward projection 60. A. spring 58 forces the arm 57upwardly so that the rollers 59 engage the cam surface 61 of the block48. Adjacent this mechanism is a supporting plate 62 on which aresecured the spaced brackets 63 in which is mounted a shaft 64 forpivotaily supporting the plate 66. i the plate 66 is urged upwardly bymeans of a spring 71 against the fixed stop 65. The plate 66 is providedwith the extension 6'? on which is secured the short pin T2 for slidablysupporting the contact disc 17 which is insulated therefrom. The spring73 resiliently resists movement of the contact disc 17. Also secured tothe supporting plate 62 is a block of insulating material 70 to which issecured the spaced contacts 20 bridged. by the contact disc 17. Theoperation of this form of the device will be described in connectionwith Fig. 6.

The diagrammatic showing in Fig. 6 illustrates the association of theelements of this invention. A wire 89 extends'in the positive side ofthe current source to the push button switch 80. One terminal of thisswitch is connected by wires 81 and 82 to one terminal of theelectro-magnetically operated fluid pressure valve 83. This fluidpressure valve is of a well known type extensively used in this art andwhen energized operates to permit the admission of fluid pressurethrough the pipe 84 and pipe 21 into the largest cylinder of the motivedevice 1. The other termi' nal of the winding of this valve is groundedas at 84. Wire 81 also connects to one con tact 20 and the other contact20 is connected to wire 85. At 86 is shown diagrammatically a switchadapted to be mounted in the path of the door so as to be moved into theposition shown in the figure just as the door closes so that theconducting strip 87 thereon moves out between the fixed contacts, one ofwhich As shown in Fig. 5'

v To open the doors switch 80 is closed. Cur

i, smrca For sake of clarity, although it is well known in the art, itmay be pointed out that the differential type of motor as shown here isalways supplied in the smaller cylinder with fluid pressure. When fluidpressure is supplied to the larger cylinder the force exerted in thesmaller cylinder is overcome and the motor operates to open the doors.To supply this fluid pressure to the larger cylinder the magnet valve 83when energized connects the larger cylinder to the fluid pressure sourcethrough itself and the pipes 21 and 84. Thus to fully open the doorsswitch must be held closed and kept closed in order to maintain thedoors opened. As soon as switch 80 is opened magnet valve 83 becomesdeenergized and permits the fluid pres sure in the larger cylinder toexhaust to the atmosphere through the valve. The force exerted in thesmaller cylinder then acts to close the doors. With this generaldiscussion it is believed that the operation of the device, as nowdescribed, will be more fully understood.

In the arrangementshown in Fig. 1 when fluid pressure is supplied to thelarger cylinder through the pipe 21 piston rod 1 begins to move to theright and carries with it the door which is connected thereto. Thestrength of spring 11 is such that it is able to resist all the normalreactions caused by the operation of the door and hence the motor 1,which is slidably supported on the supporting plate 6, does not move. Assoon, however, as the door strikes an obstruction the motor tending tomove the door on being unsuccessful will move to the left in Fig. 1sliding on the supporting plate 6 and compressing spring 11.

The motor will continue to move carrying the arm 9 with it until thelower end of the arm strikes the fixed bracket 12. By this time contactdisc 17 will have bridged the fixed contacts 20. As soon as theobstruction is removed spring 11 is strong enough to force the motorback so that the plate 5 strikes the stop 22 and the door continues toclose until fully closed. The motor will, of course, 1

continue to exert a force so that the motor will again move to the leftuntil stopped by compressing spring 11. Contacts 20 will again bebridged but produce noreversing action since just as the door completesits closing stroke and before contact 17 bridges contacts 20 theswitch86 (Fig. 6) will have been moved by the door so that contact 87 movesout from between the fixed contacts breaking the circuit which includesthe contacts 20. This operation will be described a little more indetail in connection with Fig. 6.

rentthen flows through wire 89, switch 80, wire 81, wire 82 through themagnet valve and wire 84; to ground. The magnet valve is energizedtopermit the delivery of fluid pressure to the larger cylinder of themotor The door then begins-to open and continues to open to fully openedposition and remains opened as long asswitch SOisclosed; As soon asswitch 80' is opened the larger cylinder of motor 1 opens toexhaust andthe door begins to close. Should it strikean obstruction con"- tact disc17' willbridge contacts 20 as de-' scribed above and current will flowthrough wire 89, Wire 88, contact 87, wire 85, contact 20, contact disc'17, contact 20, wire 81, wire 82',- inagn'et valve 83 azndtoground at84: The door wi 1 then begin to open-and'continue toopen untiltheobstruct-ion is removed. It might be pointed out here that switch86,-of course, moves as soon as the door begins to open to a position wherecontact 87 bridges the fixed contacts.

' The-niechanism in Fig.3is, as illustrated, interposed between thepiston rod 4 and the door. Thus during closing should the door strike anobstruction'it is held against move ment and withit rod 35 and bracket34. The notor continuing to operate forces shaft 27 to the right againstthe actionof spring 32 until contact disc '17 bridges contacts 20 whenthe circuits will be completed as before to reverse the direction ofmovement of the motor. As before, spring 32 which corre sponds tosprin'gll in the arrangement of F 1 is of suflicientstrengtl r toprevent rela tivemovement between shaft 27 and-bracket 3t under normaloperating conditions. this formof mechanism, as in the first onedescribed, a door switch 86 is of course employed. With the arrangementofFig. 3, the

wires connecting the contacts 20 must, of

course, be flexible leads since this part of the mechanism must movebackwards and for Wards. The arrangementin Fig; 1 of course does notrequire flexible leads nor does the arrangement shown in Figs. and

The arrangement in Figs. 4a and 5operates as follows: The mechanismofFig; 4 is connected between the piston rod of the motor and the doorto be operated. As the door closes spring 52 is strong enough to preventrelativemovement between" blocks 18 and 53. When the door strikes anobstruction, however, it as well as block '53 and the mechanismconnected thereto, is held against movement. Since the motor continuestotend to move forward it will overcome the resistance of spring 52 andblock 48 will be moved to the right. Its cam surface 61 acting on therollers 59 will cause arm 57 to move downwardly so that the projection60 strikes the plate 66. This causes plate 66 to move downwardly (Fig.5) carrying with it arm 67, pin 72 and contact disc 17 to a point wherethe contact disc bridges the fixed contacts 20. Circuits are thencomplete, as described before, to reverse the direction of movement ofthe motor. In this form of device the door switch 86 may be eliminatedbecause when the door is completely closed the link which connects it,as shown in Fig. 4, with the motor is moved sufficiently to the right sothat the projection 60 of arm 57 has passed the rounded end 68 of plate66. Thus, even though the arm 57 is moved downwardly as block 48 movestowards block 53, the door being closed, it does not act upon plate 66and hence contacts 20 are not bridged. During the opening movement ofthe door the end of plate 66 is turned d0wnwardly, as shown at 68, sothat the end 60 of the arm 57 may pass the end of the plate withoutstriking it.

From the foregoing disclosure it will be a; apparent that I havedisclosed an exceedingly simple and yet rugged and eificient mechanismfor carrying out the principles of this invention which employs certainprinciples of construction and operatlon. I am, of

*i course, aware that these principles may be embodied in other forms ofthe device and I do not, therefore, desire to be strictly limited to thedisclosure as given for purposes of illustration but rather to the scopeof the inven- 'tion as it is defined below.

What I seek to secure by United States Letters Patent is:

1. In a door operating apparatus in combination with a motive device, ofa link for connecting the motive device with the object to be operated,the link comprising two relatively movable members, means for resistingrelative movement of the members, a cam element attached to one of themembers and en- 2 gaging a cam surface formed on the other member and acontrol device operated by the cam element when the reaction on themotor through the link exceeds a predetermined value.

2. In a door operating apparatus in combination with a motive device, ofa link for connecting the motive device with the object to be operated,the link comprising two relatively movable members, means for resistingrelative movement of the members, a cam element attached to one of themembers and engaging a cam surface formed on the other member and acontrol device operated by the cam element for reversing the motivedevice.

In testimony whereof I have hereunto set my hand on this 15th day of MayA. D., 1930.

ROSCOE D. CONKLIN.

